Changyun Ye*†¹, Xiaoping Zhu‡, Huaiqi Jing*¹, Huamao Du*¹, Mariela Segura§¹, Han Zheng*¹, Biao Kan*, Lili Wang*, Xuemei Bai*, Yongyun Zhou*, Zhigang Cui*, Shouying Zhang*, Dong Jin*, Na Sun*, Xia Luo*, Ji Zhang*, Zhaolong Gong*, Xin Wang*, Lei Wang*, Hui Sun*, Zhenjun Li*, Qiangzheng Sun*, Honglu Liu¶, Boqing Dong#, Changwen Ke#, Hui Yuan**, Hua Wang††, Kecheng Tian‡‡, Yu Wang†, Marcelo Gottschalk§, and Jianguo Xu*† 

Author affiliations: *National Institute for Communicable Disease Control and Prevention, Beijing, People's Republic of China; †State Key Laboratory of Infectious Diseases Prevention and Control, Beijing, People's Republic of China; ‡Sichuan Provincial Center for Disease Control and Prevention, Chengdu, People's Republic of China; §Université de Montréal, Montreal, Quebec, Canada; ¶Guangxi Provincial Center for Disease Control and Prevention, Nanning, People's Republic of China; #Guangdong Provincial Center for Disease Control and Prevention, Guangzhou, People's Republic of China; **Jiangxi Provincial Center for Disease Control and Prevention, Nanchang, People's Republic of China; ††Jiangsu Provincial Center for Disease Control and Prevention, Nanjing, People's Republic of China; ‡‡Guizhou Provincial Center for Disease Control and Prevention, Guiyang, People's Republic of China